1.1 --- a/lemon/lp_cplex.h	Thu Sep 14 19:58:29 2006 +0000
     1.2 +++ b/lemon/lp_cplex.h	Thu Sep 21 14:46:28 2006 +0000
     1.3 @@ -34,7 +34,7 @@
     1.4    /// \brief Interface for the CPLEX solver
     1.5    /// 
     1.6    /// This class implements an interface for the CPLEX LP solver.
     1.7 -  class LpCplex : public LpSolverBase {
     1.8 +  class LpCplex :virtual public LpSolverBase {
     1.9  
    1.10    public:
    1.11